Maskell Posted March 16, 2013 Share Posted March 16, 2013 (edited) Hey, not new to the forum but this is my first topic! Any help with my problem would be greatly appreciated as I am pulling my hair out! Right, around 3 weeks ago I was on my way to a lake (yes my fishing gear fits in the Z!) and bottomed out on a track, pretty hard... I was only just moving in 1st, so had to be around 5mph at the time, but it stopped me dead. There was a lump on the track, which hit the left side of my car, there is no damage to the sump etc but there are scrape marks and a hole in the nearside cat's heatshield. The cat hasn't got a hole in, as far as I can tell. I jacked the car up and held my hand over the hole in the shield, no pressure at all. Hitting this lump in the track ruined my exhaust, it took the centre section away from the flange where it meets the back box. So I have replaced it from the Y pipe back with a Scorpion system, hoping this would get rid of this squeal... But it hasn't! I now how a squeal that is coming from the lower end of the engine, I can barely hear it from above, but it is loud when under the car! I have checked by belts, and these aren't causing this noise. Over the last couple of days a knock has started too, it sounds like the exhaust knocking the bottom of the car, but the exhaust is solid, there isn't enough travel for it knock! I am stumped! Has anyone else experienced this sort of noise before? I have recorded the noise in case it helps, video is below. The noise is louder when moving in 1st and 2nd, and usually appears around 3,000 rpm more than anything. Please help if you can, this is bugging the hell out of me! I have had the car 3 years and never had a problem, i'm not used to it being broken http://youtu.be/NP0F6RCyoV4 Thanks in advance for any help and advice! Rob Edited March 16, 2013 by Maskell Quote Link to comment Share on other sites More sharing options...
Seabee Posted March 16, 2013 Share Posted March 16, 2013 Noisy belt? Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted March 16, 2013 Share Posted March 16, 2013 Not rpm related so guess that something must be touching one of the pulleys. Alex. Quote Link to comment Share on other sites More sharing options...
Maskell Posted March 17, 2013 Author Share Posted March 17, 2013 Cheers for the replies guys, I have checked my belts, its not them. I also check all the pulleys were clear and they are... One little test this evening has proved its the exhaust I think... I went for a drive to get the car warm, after a spirited 10 minutes of driving the noise vanished, but instead I had a steady knock that was only happening when the exhaust note matched, if that makes sense... Am I right in thinking that this is strong evidence it is the exhaust? I have access to a ramp on Monday evening, but was hoping to fix this over the weekend! Quote Link to comment Share on other sites More sharing options...
bronzee Posted March 17, 2013 Share Posted March 17, 2013 Was the heatshield that was knocked out of place put back to where it should be? Doesn't sound like heatshield though. Quote Link to comment Share on other sites More sharing options...
Maskell Posted March 19, 2013 Author Share Posted March 19, 2013 No it wasnt, I think its the manifold now to be honest. Will report back Thursday evening! Quote Link to comment Share on other sites More sharing options...
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